GB1350063A - Protection arrangements for ac distribution circuits - Google Patents

Protection arrangements for ac distribution circuits

Info

Publication number
GB1350063A
GB1350063A GB1350063DA GB1350063A GB 1350063 A GB1350063 A GB 1350063A GB 1350063D A GB1350063D A GB 1350063DA GB 1350063 A GB1350063 A GB 1350063A
Authority
GB
United Kingdom
Prior art keywords
rectifiers
current transformers
protective
time delay
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Reyrolle Parsons Ltd
Original Assignee
Reyrolle Parsons Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Reyrolle Parsons Ltd filed Critical Reyrolle Parsons Ltd
Publication of GB1350063A publication Critical patent/GB1350063A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/083—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for three-phase systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/093—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current with timing means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current additionally responsive to some other abnormal electrical conditions
    • H02H3/105—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current additionally responsive to some other abnormal electrical conditions responsive to excess current and fault current to earth

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

1350063 Protective arrangements REYROLLE PARSONS Ltd 19 April 1971 [16 March 1970] 12516/70 Heading H2K A protective system for a three-phase distribution circuit comprises a circuit-breaker arranged to be tripped by a D.C. output signal from full-wave rectifiers 16, 17 connected to the secondary windings of two or more current transformers 12, with time delay fuses 18, 19 connected across the A.C. inputs to the rectifiers to provide inverse time delay overcurrent tripping, earth fault protective means also being provided to trip the circuit-breaker. These means may comprise current transformers having their secondary windings 11 connected to a fullwave rectifier 13 and the outputs of the rectifiers 13, 16, 17 may be connected to a single trip coil 10. A zener diode or non-linear resistor may be connected across each rectifier, Fig. 2 (not shown) or voltage transformers may be provided between the current transformers and the rectifiers, Fig. 3 (not shown).
GB1350063D 1970-03-16 1970-03-16 Protection arrangements for ac distribution circuits Expired GB1350063A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1251670 1970-03-16

Publications (1)

Publication Number Publication Date
GB1350063A true GB1350063A (en) 1974-04-18

Family

ID=10006040

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1350063D Expired GB1350063A (en) 1970-03-16 1970-03-16 Protection arrangements for ac distribution circuits

Country Status (1)

Country Link
GB (1) GB1350063A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees